ORACLE利用闪回恢复数据

ORACLE利用闪回恢复数据
测试表

删除

闪回

select count(1) from students_p as of timestamp systimestamp - interval ‘10’ minute;

SQL> flashback table students_p to timestamp to_date(‘2022-08-01 15:30:00’,‘yyyy-mm-dd hh24:mi:ss’);

Flashback complete.

SQL> select count(*) from students_p;

COUNT(*)

     8

利用SCN闪回
SQL> select * from students_p;

    ID NAME                        AGE

---

     2 张帆                         16
     2 张帆                         16
     6 林白                         41
     6 林白                         41
     4 王八                         65
     5 张飞                         70
     4 王八                         65
     5 张飞                         70

8 rows selected.

SQL> delete students_p where id>1;

8 rows deleted.

SQL> select * from students_p;

no rows selected

SQL> select current_scn from v$database;

CURRENT_SCN

257022315

SQL> flashback table students_p to scn 257020842;

Flashback complete.

SQL> select * from students_p;

    ID NAME                        AGE

---

     2 张帆                         16
     2 张帆                         16
     6 林白                         41
     6 林白                         41
     4 王八                         65
     5 张飞                         70
     4 王八                         65
     5 张飞                         70

8 rows selected.

SQL>
加粗样式